#include <iostream.h>
//Wilson
int factorial(int nr)
{
    if(nr==0 || nr==1)
        return 1;
    else
        return nr*factorial(nr-1);
}
int wilson(int nr)
{
    return (factorial(nr-1)%nr);
}
int main()
{
    int n;
    cout<<wilson(n); 
}